/* fastPDF Web 设计系统
   品牌：近黑 #0e0f10 / 暖白 #ecece6 / 红 #ff4848（与 fastPDF for Mac 同源）
   原则：扁平克制、无霓虹光晕、衬线大标题 + 无衬线正文 */

:root {
  --bg: #0e0f10;
  --bg-raised: #151718;
  --bg-card: #191b1d;
  --bg-hover: #202325;
  --border: #2a2d30;
  --border-strong: #3a3e42;
  --text: #ecece6;
  --text-dim: #a8a89f;
  --text-faint: #7a7a72;
  --accent: #ff4848;
  --accent-deep: #c81e1e;
  --accent-grad: linear-gradient(135deg, #ff4848, #b91c1c);
  --accent-soft: rgba(255, 72, 72, 0.12);
  --ok: #4ade80;
  --warn: #fbbf24;
  --err: #f87171;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --font-display: "Georgia", "Songti SC", "STSong", "SimSun", ui-serif, serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --maxw: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--text); text-decoration: none; }
a:hover { color: #fff; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible,
textarea:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ── Header ─────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14, 15, 16, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; gap: 20px;
  height: 60px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
.brand .logo {
  width: 28px; height: 28px; border-radius: 7px;
  background: var(--accent-grad);
  display: grid; place-items: center;
  color: #fff; font-family: var(--font-display); font-size: 15px; font-weight: 700;
}
.brand em { font-style: normal; color: var(--text-faint); font-weight: 400; font-size: 13px; }
.main-nav { display: flex; gap: 4px; margin-left: 8px; }
.main-nav a {
  padding: 6px 12px; border-radius: 8px;
  color: var(--text-dim); font-size: 14px;
}
.main-nav a:hover { color: var(--text); background: var(--bg-hover); }
.header-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.privacy-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 4px 12px; white-space: nowrap;
}
.privacy-pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); }

.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 6px 10px; font-size: 14px; cursor: pointer; }

/* ── Buttons ────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: none; cursor: pointer; border-radius: 10px;
  font-size: 15px; font-weight: 600; font-family: var(--font-body);
  padding: 11px 22px; transition: transform 0.12s ease, filter 0.12s ease;
}
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--accent-grad); color: #fff; }
.btn-primary:hover:not([disabled]) { filter: brightness(1.1); }
.btn-secondary { background: var(--bg-hover); color: var(--text); border: 1px solid var(--border-strong); }
.btn-secondary:hover:not([disabled]) { background: var(--border); }
.btn-ghost { background: transparent; color: var(--text-dim); border: 1px solid var(--border); }
.btn-ghost:hover:not([disabled]) { color: var(--text); border-color: var(--border-strong); }
.btn-sm { padding: 7px 14px; font-size: 13.5px; border-radius: 8px; }
.btn-block { width: 100%; }

/* ── Hero（首页） ────────────────────────────── */
.hero { padding: 72px 0 40px; }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5.5vw, 56px);
  line-height: 1.15; margin: 0 0 18px; font-weight: 700;
}
.hero h1 .accent { color: var(--accent); }
.hero .lede { font-size: 18px; color: var(--text-dim); max-width: 640px; margin: 0 0 28px; }
.badges { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13px; color: var(--text-dim);
  border: 1px solid var(--border); background: var(--bg-raised);
  padding: 6px 14px; border-radius: 999px;
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ── Section 通用 ────────────────────────────── */
section.block { padding: 44px 0; }
.block-title {
  font-family: var(--font-display);
  font-size: 28px; margin: 0 0 8px;
}
.block-sub { color: var(--text-dim); margin: 0 0 26px; }

/* ── 工具网格 ────────────────────────────────── */
.cat-group { margin-bottom: 34px; }
.cat-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 14px; }
.cat-head h2 { font-size: 20px; margin: 0; font-weight: 700; }
.cat-head p { margin: 0; color: var(--text-faint); font-size: 13.5px; }
.tool-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
}
.tool-card {
  display: block; padding: 18px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.tool-card:hover { border-color: var(--accent-deep); transform: translateY(-2px); }
.tool-card .t-name { font-weight: 600; font-size: 15.5px; margin-bottom: 5px; display: flex; align-items: center; gap: 8px; }
.tool-card .t-name .ico { color: var(--accent); font-size: 14px; }
.tool-card .t-desc { font-size: 13px; color: var(--text-dim); line-height: 1.5; }
.tool-card .t-soon { font-size: 11px; color: var(--warn); border: 1px solid rgba(251,191,36,.4); padding: 1px 7px; border-radius: 999px; margin-left: 6px; }

/* ── 面板 / 卡片 ─────────────────────────────── */
.panel {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px;
}

/* ── 工具页 ─────────────────────────────────── */
.crumbs { font-size: 13px; color: var(--text-faint); padding: 22px 0 0; }
.crumbs a { color: var(--text-faint); }
.crumbs a:hover { color: var(--text); }
.crumbs .sep { margin: 0 7px; color: var(--border-strong); }
.tool-hero { padding: 26px 0 8px; }
.tool-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 38px); margin: 0 0 10px;
}
.tool-hero .sub { color: var(--text-dim); max-width: 720px; margin: 0 0 14px; }
.local-note {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-dim);
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 14px; margin-bottom: 10px;
}
.local-note .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); }

.tool-workspace { display: grid; gap: 18px; padding: 16px 0 60px; }

/* ── 上传区 ─────────────────────────────────── */
.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-raised);
  padding: 44px 20px;
  text-align: center; cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: #1a1416; }
.dropzone .dz-icon { font-size: 34px; margin-bottom: 10px; color: var(--accent); }
.dropzone .dz-main { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.dropzone .dz-hint { font-size: 13px; color: var(--text-faint); }
.dropzone input[type="file"] { display: none; }

/* ── 文件列表 ────────────────────────────────── */
.file-list { display: grid; gap: 10px; margin-top: 14px; }
.file-item {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 14px;
}
.file-item .f-icon { color: var(--accent); flex: none; }
.file-item .f-meta { min-width: 0; flex: 1; }
.file-item .f-name { font-size: 14px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item .f-size { font-size: 12px; color: var(--text-faint); }
.file-item .f-status { font-size: 12.5px; color: var(--text-dim); white-space: nowrap; }
.file-item .f-status.ok { color: var(--ok); }
.file-item .f-status.err { color: var(--err); }
.file-item .f-actions { display: flex; gap: 6px; flex: none; }
.icon-btn {
  background: var(--bg-hover); border: 1px solid var(--border);
  color: var(--text-dim); border-radius: 7px;
  width: 30px; height: 30px; cursor: pointer; font-size: 13px;
  display: inline-grid; place-items: center;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); }
.icon-btn.grab { cursor: grab; }

/* ── 选项 ───────────────────────────────────── */
.options { display: grid; gap: 18px; }
.opt-row label.opt-label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.opt-help { font-size: 12.5px; color: var(--text-faint); margin-top: 6px; }
.seg-group { display: flex; flex-wrap: wrap; gap: 8px; }
.seg-group .seg {
  position: relative;
}
.seg-group input[type="radio"], .seg-group input[type="checkbox"] { position: absolute; opacity: 0; }
.seg-group .seg-btn {
  display: inline-block; padding: 8px 16px;
  border: 1px solid var(--border-strong); border-radius: 9px;
  font-size: 14px; color: var(--text-dim); cursor: pointer;
  background: var(--bg-raised);
  transition: all 0.12s ease;
}
.seg-group input:checked + .seg-btn {
  border-color: var(--accent); color: var(--text); background: var(--accent-soft);
}
.seg-group input:focus-visible + .seg-btn { outline: 2px solid var(--accent); outline-offset: 2px; }
.seg-group .seg-btn small { display: block; font-size: 11.5px; color: var(--text-faint); font-weight: 400; }
.seg-group input:checked + .seg-btn small { color: var(--text-dim); }

.field-input, .field-select, .field-textarea {
  width: 100%; background: var(--bg-raised);
  border: 1px solid var(--border-strong); border-radius: 9px;
  color: var(--text); font-size: 14.5px; font-family: var(--font-body);
  padding: 10px 13px;
}
.field-input:focus, .field-select:focus, .field-textarea:focus { border-color: var(--accent); outline: none; }
.field-textarea { resize: vertical; min-height: 90px; }
.opt-grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .opt-grid2 { grid-template-columns: 1fr; } }

input[type="range"].field-range { width: 100%; accent-color: var(--accent); }
.range-value { font-family: var(--font-mono); font-size: 13px; color: var(--text-dim); }
.field-check { display: flex; align-items: center; gap: 9px; font-size: 14px; color: var(--text-dim); cursor: pointer; }
.field-check input { accent-color: var(--accent); width: 16px; height: 16px; }

/* ── 运行/进度/结果 ──────────────────────────── */
.run-bar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.progress { height: 6px; background: var(--bg-hover); border-radius: 999px; overflow: hidden; margin-top: 14px; }
.progress .bar { height: 100%; width: 0%; background: var(--accent-grad); border-radius: 999px; transition: width 0.25s ease; }
.status-line { font-size: 13px; color: var(--text-dim); margin-top: 9px; min-height: 18px; }

.result-list { display: grid; gap: 10px; }
.result-item {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px 14px;
}
.result-item .r-name { flex: 1; min-width: 0; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.result-item .r-size { font-size: 12px; color: var(--text-faint); flex: none; }
.result-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.result-head h3 { margin: 0; font-size: 16px; }

.callout {
  border: 1px solid var(--border); border-left: 3px solid var(--accent);
  background: var(--bg-raised); border-radius: var(--radius-sm);
  padding: 12px 16px; font-size: 13.5px; color: var(--text-dim); margin-top: 14px;
}
.callout.warn { border-left-color: var(--warn); }
.callout.err { border-left-color: var(--err); }

/* ── 缩略图网格（organize） ───────────────────── */
.thumb-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.thumb-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px;
  display: flex; flex-direction: column; gap: 8px;
}
.thumb-card.dragover { border-color: var(--accent); }
.thumb-card img { width: 100%; height: auto; border: 1px solid var(--border); border-radius: 5px; background: #fff; pointer-events: none; }
.thumb-card .th-num { font-size: 12px; color: var(--text-faint); font-family: var(--font-mono); }
.thumb-card .th-actions { display: flex; gap: 5px; flex-wrap: wrap; }
.thumb-card.removed { opacity: 0.35; }

/* ── OCR/AI 聊天 ────────────────────────────── */
.text-output {
  width: 100%; min-height: 220px;
  background: var(--bg-raised); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); color: var(--text);
  font-family: var(--font-mono); font-size: 13px; line-height: 1.6;
  padding: 14px; resize: vertical;
}
.chat-box { display: flex; flex-direction: column; gap: 14px; min-height: 320px; }
.chat-msg { max-width: 85%; padding: 11px 15px; border-radius: 12px; font-size: 14.5px; white-space: pre-wrap; word-break: break-word; }
.chat-msg.user { align-self: flex-end; background: var(--accent-soft); border: 1px solid rgba(255,72,72,.35); }
.chat-msg.assistant { align-self: flex-start; background: var(--bg-card); border: 1px solid var(--border); }
.chat-msg.assistant.thinking { color: var(--text-faint); font-style: italic; }
.chat-input-row { display: flex; gap: 10px; }
.chat-input-row textarea { flex: 1; min-height: 52px; max-height: 140px; }

/* ── 信息区块 ────────────────────────────────── */
.feature-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.feature-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.feature-card h3 { margin: 0 0 8px; font-size: 16px; }
.feature-card p { margin: 0; font-size: 13.5px; color: var(--text-dim); }
.feature-card .f-ico { color: var(--accent); font-size: 20px; margin-bottom: 10px; }

.faq-list { display: grid; gap: 10px; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.faq-item summary {
  cursor: pointer; padding: 15px 18px; font-size: 14.5px; font-weight: 600;
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 10px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--accent); font-size: 18px; }
.faq-item[open] summary::after { content: "−"; }
.faq-item .faq-body { padding: 0 18px 15px; font-size: 13.5px; color: var(--text-dim); }

/* ── Footer ─────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 44px 0 60px; margin-top: 40px;
  color: var(--text-faint); font-size: 13.5px;
}
.footer-grid { display: grid; gap: 30px; grid-template-columns: 2fr 1fr 1fr 1fr; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-grid h4 { color: var(--text-dim); font-size: 13px; margin: 0 0 12px; font-weight: 600; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer-grid a { color: var(--text-faint); }
.footer-grid a:hover { color: var(--text); }
.footer-brand .logo-row { display: flex; align-items: center; gap: 9px; margin-bottom: 10px; font-weight: 700; color: var(--text); }
.footer-brand p { margin: 0; max-width: 300px; line-height: 1.6; }
.roadmap-note { color: var(--text-faint); font-size: 12px; margin-top: 10px; }

/* ── 响应式 ─────────────────────────────────── */
@media (max-width: 860px) {
  .main-nav {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    background: var(--bg-raised); border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 10px 20px 16px; gap: 2px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 11px 12px; font-size: 15px; }
  .nav-toggle { display: inline-block; }
  .privacy-pill { display: none; }
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

::selection { background: rgba(255, 72, 72, 0.35); }

/* 工具区预留高度：boot 异步挂载工具面板时避免布局位移（CLS） */
.tool-workspace { min-height: 560px; }
@media (max-width: 860px) { .tool-workspace { min-height: 640px; } }

.lang-switch {
  border: 1px solid var(--border-strong); border-radius: 8px;
  color: var(--text-dim); font-size: 13px; padding: 5px 12px;
  white-space: nowrap;
}
.lang-switch:hover { color: var(--text); border-color: var(--accent); }
@media (max-width: 860px) { .lang-switch { display: none; } }